phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '-1' for key 'session_user_id'

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('87894e29be05c0f5d8be25916d6a9977', -1, 1713519341, 1713519341, '12dfacfc', -4, 0, 0)

Line : 187
File : sessions.php